PCV maintenance -please explain
 

99 S70GLT, on page 121 of the owner's manual it says:

Servicing PCV system
The orifice nipple in the intake manifold and the filter at the end of the PCV hose in the air cleaner should be inspected at 60K miles and thereafter every 30K miles.

Can someone please explain exactly where these 2 items are located?Thanks.